干燥时间对快干硅溶胶型壳质量的影响

Effect of Drying Time on the Quality of Quick-drying Colloidal Silicon Shell

采用快干硅溶胶作为粘结剂,分别选用8 h和20 h为背层干燥时间得到硅溶胶型壳,通过重量法获得型壳的干燥程度,研究干燥时间对型壳质量的影响。结果表明,8 h干燥后的失水重量与20 h干燥后的失水重量相比无明显变化,且8 h干燥和20 h干燥后均获得较为致密的型壳,型壳表面光滑,没有剥落及裂纹。

The silica sol shell was obtained by using quick-drying silica sol as binder,and using 8 h and 20 h as the drying time of the back layer respectively.The drying degree of the shell was obtained by weight method,and the effect of drying time on the quality of the shell was studied.The results show that the water loss weight after 8 h drying have no significant change compared with that after 20 h drying,and the compact shell is obtained after 8 h drying and 20 h drying,with smooth surface and no peeling and crack.